Automatic gun



Sept. '15, 1925 v 1,553,992

' A. T. DAWSON ET AL AUTOMATIC GUN- Fil ed June 17. 1925 1 1 re,urmuwnni awe: ARTHQB" new i drawings in whichz fl i V. i

a i *Figuresl, 2 and 3 are respectively aside 7 1 i i elevation, a frontelevation and. a plan shew-' 1 A is forms parts ofa mountingof thepedestal Patented Sept. '15,

i V L QNE-QNn QEGLA NQ,

" i spawn-eta ri in J 1 l amw\? t ;-l l- 'Belati-n' t Antoni" tiGlpl$i-QiWl1lClI the This invention relates to automatiU'guns,

particularly those of the Vickers type, V

- According to the invention a hollow trunnion is provided on thecartridgefeed side v v of the gun and is made of sufliciently large boreto permit of the passage of ammunltion through it tothe cartridge feedmecha- 7. nismof the gun, wherebyavoi'ding difii'culties' which are atpresent sometimes experienced, especially with high angle guns, due tothe carriage impeding the free entranceof the ammunition to, the feedbox'of the gun. When belt or strip ammunition is used the other,trunnion is also made hollow and of i 2. sufi'ieient bore to permit ofthe passage of the empty cartridge belt or the clips or links .ofthestrip; i r

In order that the said invention may be p Qclearly understood andreadily carried} into effect, the same will now; be described more fullywith reference to the accompanying 'ing anautomatic gun of the Vicker'stype, constructed'in accordance with this inventhe automatic guntr-unnioned in a carriage [B by means of hollow trunnions V C, C. Thiscarriage, in the example shewn,

type but it may' equallyj well form part of a mounting of any otherdesired type.

v h ight-hand hollow trunnion is so situated and of'such'a bore astofullyex- Y -rpos e the cartridge feed opening in-the mechanism casing(see Figure l) so-that a charged cartridge belt or strip can pass fromabox in the case of a strip composedof metal slips or links) passesthrough the l ft-ha d drum contains one-,or more lay ersiof carisimparted during firing so that the car s ,D-(attached to theftrunnion)through the'g said trunnion tothecartridge feed mecha, V nism. The emptybelt in the case of a fabric belt '(orthe empty cartridge clips or links111 1 25-74 sw n 2 9: a

thetwo hollow trunnionsnre connected" to so 4. e 1 e e a (E gm ich Pasit 'ns i ely n t t-t-hefguinthe husf ime a -th meaija Sm as age-y hollowtrunnion; Inthe'con'st uction:sliewn V ekh l i 'f imnion andt ellthe'meohanismcasing. niv me-.r esao lyvO ient gun) needbe made hollow;thus the usual 1 feed box mouthpiece-can be extended in a horizontaldirection, or alternatively curved 'downwardly,the cartridges beingurged into V the feed box by a. spring actingdirectly 7 or indirectly onthe outermost cartridge in -a similar manner to the magazine of an ordi-"nary rifle. The usual feed levers providedin; l

a gun of the Viokers typewould' ensure the cartridge being carried intoits correct position immediately'over the barrel axis. 1; It

will be understood,iof-course, that the above 7 7,

described extension of the mouthpiece'of the 1 feed box can be adetachable hopper which j contains the cartridges and which can-bedetachably connected tothefeed box mouthpiece by suitable catches. Inanother lar- I 'rangement which necessitates the provision ofonly onehollowtrunnion the borev-of'the hollow trunnion can be utilized'toreceive f acircular drum which may be of the usual operated type,this drum being detachably held by means of suitable catches. J The saidtridges placed radially and means are proj 1 vided wherebya'step-by-steprotary motion tridges are ejected from the drum into theentrance; of the feed box; The ordinary feed levers'provided in agun'oftheVickers V w type. would then'ensu re the cartridges being atelyover the barrel axis."

"carried into their correctposition o 'immedi-jy It will be-seen thatbyreasonlo'f this'in vention the carriage will not ofler any im pedimentat high angles of elevation of the f un to the freeentrance vof theammunition to'the feed box of'the gun";

What we claim and desire to secure by "Letters Patent-of the UnitedStates is V 1. In anoautomatic gun, the;provision on the cartridgefeedside ot ahollowtrunnion pattern used in automatic guns of-the'gas"of sufliciently large bore to permit of the passage of ammunitionthrough it to the cartridge feed mechanism of the gun.

2. In an automatic gun, the combination with the mechanism casing, of ahollow trunnion of sufficiently large bore to permit of the passage ofammunition through it to the cartridge feed mechanism of the gun, andmeans for attaching said hollow trunnion to the mechanism casing.

8. In an automatic gun, the combination with the mechanism casing, of ahollow trunnion on the cartridge feed side of sufficiently large bore topermit of the passage of ammunition through it to the cartridge feedmechanism of the gun, .a second hollow trunnion on the opposite side forthe passage of the empty cartridge belt or the clips or links of stripammunition, and means for attaching said hollow trunnions to themechanism casing.

- 4. In an automatic gun, the combination with the elements claimed inclaim 2, of a box attached to the hollow trunnion for the reception ofthe charged cartridge belt or mechanism casing and means for feedingcartridges one at a time to the feed mechanism of the gun.

6. In an automatic gun, the combination with the elements claimed inclaim 2, of a solid trunnion on the opposite side of the mechanismcasing and means located within the hollow trunnion for feeding cartridges one at a time to the feed mechanism of the gun.

ARTHUR TREVOR DAWSON. GEORGE THOMAS BUCKHAM. CARL ALFRED LARSSON.

